Population Aggregation in the Prehistoric North American Southwest

Abstract
We attempt to clarify the role of demographic factors (size, density, history, and trajectory) in aggregation in the ancestral Puebloan Southwest, which we found obscure in Leonard and Reed (1993). In addition, we question one of the case studies from Chaco Canyon that they used to support their model, and we suggest that data from the Mesa Verde region between A.D. 700 and 1300 argue against the generality of their explanation for aggregation.